aat1155 Datasheet - Analogictech
The AAT1155 is a high efficiency, step-down DC/DC converter that delivers an output current of up to 1A.
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📝 Component Overview
The AAT1155 is a high efficiency, step-down DC/DC converter that delivers an output current of up to 1A. It operates from an input voltage range of 2.7V to 5.5V and can produce an output voltage as low as 0.6V. The device is designed for use in portable electronics, such as cellular phones, PDAs, and digital cameras.
Key Features and Benefits
- High efficiency step-down converter
- Input voltage range: 2.7V to 5.5V
- Output voltage range: 0.6V to Vin
- Output current: up to 1A
- Low dropout voltage
- Over-temperature protection
- Short-circuit protection
Typical Applications
- Portable electronics
- Cellular phones
- PDAs
- Digital cameras
- MP3 players
- Wireless headsets
📊 Complete Technical Specifications
Absolute Maximum Ratings
| Parameter | Value |
|---|---|
| Input Voltage | 5.5V |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +150°C |
Electrical Characteristics
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Efficiency | Vin = 3.6V, Vout = 1.8V, Iout = 500mA | 85% | 90% | 92% | % |
| Output Voltage Accuracy | Vin = 3.6V, Vout = 1.8V, Iout = 500mA | -2% | 0% | 2% | % |
Package Information
- MSOP-8: 8-lead MSOP package
Pin Configuration
- Pin 1: VIN - Input voltage
- Pin 2: GND - Ground
- Pin 3: FB - Feedback voltage
- Pin 4: VOUT - Output voltage
- Pin 5: EN - Enable input
- Pin 6: NC - No connection
- Pin 7: NC - No connection
- Pin 8: LX - Switching node
🔧 Application Guidelines
Design Considerations
The AAT1155 is a high efficiency step-down converter that requires careful design consideration to ensure optimal performance. The input capacitor should be placed as close as possible to the input pin, and the output capacitor should be placed as close as possible to the output pin.
Installation Guidelines
The AAT1155 should be mounted on a printed circuit board with adequate thermal dissipation. The device should be soldered to the board using a reflow soldering process.
Operational Notes
The AAT1155 is a high efficiency converter that can operate at high temperatures. However, the device should not be operated at temperatures above 125°C for extended periods of time.